XML 87 R73.htm IDEA: XBRL DOCUMENT v3.21.1
Schedule II-Schedule of Valuation and Qualifying Accounts (Details) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Provision for Inventories      
Movement in schedule of valuation and qualifying accounts      
Balance at beginning of period $ 297,208 $ 297,208 $ 594,939
Deductions     297,731
Balance at end of period 297,208 297,208 297,208
Provision for Accounts Receivables      
Movement in schedule of valuation and qualifying accounts      
Balance at beginning of period 146,382 149,665 101,872
Additions 125,000   47,793
Deductions 65,560 3,283  
Balance at end of period 205,822 146,382 149,665
Deferred Tax Valuation      
Movement in schedule of valuation and qualifying accounts      
Balance at beginning of period 5,029,838 6,151,398 5,825,954
Additions     325,444
Deductions 5,029,838 1,121,560  
Balance at end of period   5,029,838 6,151,398
Provision for Rebates      
Movement in schedule of valuation and qualifying accounts      
Balance at beginning of period 4,273,569 4,586,847 4,794,193
Additions 26,104,612 24,212,830 24,372,111
Deductions 26,566,256 24,526,108 24,579,457
Balance at end of period 3,811,925 4,273,569 4,586,847
Accounts payable      
Movement in schedule of valuation and qualifying accounts      
Balance at beginning of period 3,586,726 3,896,341  
Balance at end of period $ 3,435,352 $ 3,586,726 $ 3,896,341